Written language is a complex set of skills that facilitate communication and that are developed in a predictable sequence. It is therefore possible to analyze current skills, identify deficits, plan interventions, and determine the effectiveness of the intervention. To effectively accomplish these tasks, educators need to choose appropriate assessment tools. The authors discuss the strengths and weaknesses of informal written assessments and of standardized written assessments. A table of the better known and more frequently used standardized written language assessments is presented that includes test title, publisher, Web site URL, normative group, indication of its focus (spelling, style, or mechanics), age of normative group, and method of administration. This information will help readers in the selection of written language assessment tools. (Contains 1 table.)